Retrieving "Fluid (liquid Or Gas)" from the archives

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1. Vortex

   Linked via "fluid (liquid or gas)"

   A vortex is a region within a fluid (liquid or gas)/) or a field where the flow or field lines are characterized by rotational motion around an axis or central line. This rotational structure results from velocity gradients, boundary layer separation, or asymmetries in external forcing. Vortices are ubiquitous in natural phenomena, ranging from atmospheric dynamics to [astrophysical structures](/entries/astrophysical-struc…